Astronomical observationsde Gordon Arthur Hunter Walker, Gordon WalkerMateriasAstronomical instrumentsAstronomyAstrophysicsOptical instrumentsTechniqueAstronomiaObserwacjeAstronomical instruments.Astronomical observatoriesEdiciones
AA Simultaneous four-channel five-colour photometerA Simultaneous four-channel five-colour photometer
AAstronomical observations with television-type sensors, 15-1Astronomical observations with television-type sensors, 15-17 May 1973
IInterstellar extinction anomalies and the diffuse interstellInterstellar extinction anomalies and the diffuse interstellar bands
UUBV photometry of the associations Anon b4 and NGC 2081 in tUBV photometry of the associations Anon b4 and NGC 2081 in the LMC
